CN109403295B - Semi-submersible type supporting platform and positioning method thereof - Google Patents
Semi-submersible type supporting platform and positioning method thereof Download PDFInfo
- Publication number
- CN109403295B CN109403295B CN201710704660.1A CN201710704660A CN109403295B CN 109403295 B CN109403295 B CN 109403295B CN 201710704660 A CN201710704660 A CN 201710704660A CN 109403295 B CN109403295 B CN 109403295B
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- Prior art keywords
- positioning
- support leg
- upper deck
- cylinders
- seat
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0039—Methods for placing the offshore structure
- E02B2017/0047—Methods for placing the offshore structure using a barge
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0056—Platforms with supporting legs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
A semi-submerged supporting platform for offshore operation after running to fixed point on sea surface is composed of an upper deck, a lower floating box with multiple vertical columns for connecting them together, multiple vertical columns with a supporting foot passing through them longitudinally, multiple spaces in the lower floating box for supplying water to it, and a cabin for supplying water to it, and a levelling mechanism in each vertical column.
Description
Technical Field
The invention relates to an offshore operation platform, in particular to a semi-submersible type supporting platform and a positioning method thereof.
Background
When the offshore hanging operation is carried out, a platform capable of running on the sea surface is commonly used, the offshore hanging operation can be carried out after the platform runs to a fixed point, but the offshore hanging operation can be kept stable in the hanging operation, and particularly, in order to avoid the longitudinal floating of the platform caused by storms, the platform must be positioned on the sea surface by utilizing a positioning means as much as possible, so that the stability and the safety of the hanging operation are facilitated.
For example, U.S. patent publication nos. US7594781B1 and US7815398B2 both disclose a platform for offshore operations, in which a deck is provided with a plurality of legs, and when the platform is driven to a fixed point, the legs are driven to move down to be supported on the seabed, and then the deck is lifted to the sea surface, so as to prevent the platform from being floated longitudinally by wind waves, thereby maintaining the stability of the platform. However, when the platform is supported by the legs and is separated from the water surface, the bottom of the platform is raised by the sea waves and lifted, and when the sea waves are removed, a vacuum phenomenon occurs at the bottom of the platform, which causes a downward attraction force to the platform, like increasing the weight of the platform instantly, thus causing the situation that the legs sink again, and thus causing the problem that the platform sinks due to the sea waves, causing instability of the height position of the platform, and thus being not beneficial to the operation of the platform on the sea. In addition, the downward movement of the leg support depends on the driving of the mechanical structure, and the driving capability of lifting the deck to the sea surface must be achieved, so that the platform usually has the problems of heavy load and slow speed.
Another example of a platform for offshore operations is disclosed in U.S. patent publication nos. USRE29478 and US7219615B2, which are both patents, and belong to a semi-submersible platform, wherein a lower buoyancy tank is provided below an upper deck, and the lower buoyancy tank is submerged by injecting seawater therein, so that the center of gravity can be moved to the sea surface, and the platform is tensioned by cables or cables, thereby preventing the platform from being longitudinally floated by wind and waves, and maintaining the stability of the platform. However, in practice, even if the center of gravity of the platform moves to the sea surface and the cable or the wire rope is tightened, the platform will still float longitudinally due to wind and wave, which inevitably causes unstable conditions during offshore operation.
Disclosure of Invention
The present invention is directed to a semi-submersible support platform and a positioning method thereof, which can achieve the effects of economy and stable platform positioning by using a support leg to inject seawater to sink to a position supported on the sea bed, and a lower floating box to inject seawater to move down the center of gravity of the sea surface.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a semi-submersible supporting platform and a positioning method thereof, the semi-submersible supporting platform is used for offshore operation after running to a fixed point on the sea surface, and comprises an upper deck and a lower floating box, wherein the upper deck is connected with the lower floating box through a plurality of stand columns, each stand column is provided with a support leg which is longitudinally penetrated, a plurality of spaces are arranged in the lower floating box, the space can be used for supplying water to sink or float after being injected or drained, each support leg is provided with a cabin, the cabin can be used for supplying water to sink or float after being drained, a leveling mechanism is arranged in each stand column, when each support leg sinks to touch the sea bed, the leveling mechanism in each stand column is combined and supported on the penetrated support leg, and each leveling mechanism can respectively drive the upper deck to move upwards or downwards on the supported support leg.
Wherein, each leveling mechanism is provided with a plurality of upper positioning cylinders which are arranged oppositely in the upright column and arranged in an upper seat, and a plurality of lower positioning cylinders which are arranged oppositely in a lower seat; the upper seat and the lower seat are connected by a plurality of pushing cylinders, each upper positioning cylinder and each lower positioning cylinder are provided with a positioning rod capable of transversely stretching, the support leg supported by each adjusting mechanism is provided with a positioning hole for each positioning rod to correspondingly penetrate, the plurality of upper positioning cylinders or the plurality of lower positioning cylinders extend into the positioning holes of the support leg supported by the positioning rods respectively, and the plurality of pushing cylinders drive the lower seat to be close to or far away from the upper seat so as to drive the upper deck to move upwards or downwards.
Wherein, each upright post is provided with a wave elimination channel, the wave elimination channel is provided with a through hole at a plurality of sides of the upright post, and the through holes are communicated in the upright post by pipelines, so that when waves attack the upright post, seawater can enter from one through hole and flow out from the other through holes through the pipelines, thereby eliminating the force of the waves attacking the upright post.
The positioning method is that after the semi-submersible supporting platform runs to a fixed point on the sea surface, the cabin of each support leg supplies water to inject the water and then sinks to touch the sea bed, the leveling mechanisms in the stand columns are combined to support the support legs penetrating through the cabin, the support legs penetrating through the stand columns sink again after the water is injected from a plurality of spaces in the lower floating box, and the leveling mechanisms can respectively drive the upper deck to move upwards or downwards on the support legs supported by the leveling mechanisms until the upper deck is horizontal.
The upward moving is that the plurality of lower positioning cylinders extend into the positioning holes of the supported support legs by positioning rods respectively, the positioning rods of the plurality of upper positioning cylinders move out of the positioning holes, the plurality of pushing cylinders drive the upper seat to be far away from the lower seat so as to drive the upper deck to move upward, and the positioning rods of the plurality of upper positioning cylinders extend into the positioning holes to be positioned after the upper deck is positioned; the downward movement is realized by that the plurality of lower positioning cylinders respectively extend to the positioning holes of the supported support legs by positioning rods, the positioning rods of the plurality of upper positioning cylinders move out of the positioning holes, the plurality of pushing cylinders drive the upper seat to be close to the lower seat so as to drive the upper deck to move downward, and the positioning rods of the plurality of upper positioning cylinders extend to the positioning holes to be positioned after the upper deck is positioned.
The invention has the beneficial effects that: the invention relates to a semi-submersible supporting platform and a positioning method thereof, which utilize a supporting leg to inject seawater to sink to be supported on a seabed, and a lower floating box to inject the seawater to move the gravity center down to the sea surface, thereby achieving the effects of economy and stable positioning of the platform.
These and other objects and advantages of the present invention will be readily apparent from the following detailed description of the selected embodiments and the accompanying drawings.
Drawings
FIG. 1 is a schematic plan view of a platform of the present invention.
Fig. 2 is a schematic plan view of the column of the present invention with leveling mechanisms and a wave suppression channel.
FIG. 3 is a cross-sectional view of the wave suppression channel in the four columns of the invention viewed from above in a two-lower buoyancy tank.
Fig. 4 is a schematic view of the leg of fig. 1 being submerged by injecting seawater.
Fig. 5 is a schematic view of the buoyancy tank of fig. 4 submerged by injecting seawater.
Fig. 6 is a schematic view of the leveling mechanism of fig. 2 in a state where the positioning rod of the lower positioning cylinder is inserted into the positioning hole of the leg.
Fig. 7 is a schematic view illustrating a state that the pushing cylinder pushes the upper deck to move upward in fig. 6.
Fig. 8 is a schematic view showing a state in which the positioning rod of the upper positioning cylinder of fig. 7 is inserted into the positioning hole of the leg.
Detailed Description
Referring to fig. 1-8, selected embodiments and preferred embodiments of the present invention are shown for illustrative purposes only and are not limited to the embodiments described in the present application.
The invention provides a semi-submersible supporting platform and a positioning method thereof, the semi-submersible supporting platform is used for offshore operation after a sea surface A drives to a fixed point, and comprises an upper deck 1 and a lower buoyancy tank 2, the upper deck 1 and the lower buoyancy tank 2 are connected by a plurality of upright posts 3, and each upright post 3 is provided with a supporting leg 4 which is longitudinally penetrated. The lower buoyancy tank 2 has a plurality of spaces 21 therein, the plurality of spaces 21 allowing water to be supplied thereto and then sink or float after being drained, and each leg 4 has a chamber 41, the chamber 41 allowing water to be supplied thereto and then sink or float after being drained. The compartment 41, in this embodiment, is located at the bottom of each leg 4.
As shown in fig. 2, a leveling mechanism 5 is disposed in each upright column 3, and when each support leg 4 sinks to touch the seabed B, the leveling mechanism 5 in each upright column 3 is combined to support the support leg 4, and each leveling mechanism 5 can drive the upper deck 1 to move up or down on the support leg 4. In the present embodiment, each leveling mechanism 5 has a plurality of upper positioning cylinders 51 opposite to each other in the column 3, the plurality of upper positioning cylinders 51 are disposed in an upper seat 31, each leveling mechanism 5 has a plurality of lower positioning cylinders 52 opposite to each other in a lower seat 53, the plurality of lower positioning cylinders 52 are disposed in a lower seat 53, the upper seat 31 and the lower seat 53 are connected by a plurality of pushing cylinders 54, each upper positioning cylinder 51 has an upper positioning rod 511 capable of extending and retracting laterally, and each lower positioning cylinder 52 has a lower positioning rod 521 capable of extending and retracting laterally. The supporting legs 4 supported by each adjusting mechanism 5 are provided with positioning holes 42, the positioning holes 42 are provided for the upper positioning rods 511 and the lower positioning rods 521 to correspondingly penetrate, so that a plurality of upper positioning cylinders 51 or a plurality of lower positioning cylinders 52 can respectively extend the upper positioning rods 511 and the lower positioning rods 521 into the positioning holes 42 of the supported supporting legs 4, and a plurality of pushing cylinders 54 can drive the lower base 53 to approach or separate from the upper base 31 so as to drive the upper deck 1 to move up or down.
As shown in fig. 3, each upright column 3 is provided with a wave-absorbing channel 32, the wave-absorbing channel 32 is provided with through holes 321 on a plurality of sides of the upright column 3, and the through holes 321 are communicated with each other by pipelines 322 in the upright column 3, so that when waves hit the upright column 3, seawater can enter through one through hole 321 and flow out through the other through holes 321 through the pipelines 322, so as to eliminate the force of the waves hitting the upright column 3. As shown in fig. 3, the present embodiment has two lower buoyancy tanks 2, each of which has two columns 3 arranged in tandem.
After the semi-submersible type supporting platform drives to a fixed point on the sea surface A, as shown in figure 4, the cabin 41 of each support leg 4 supplies water to be injected and then sinks to touch the seabed B, and the leveling mechanisms 5 in each upright post 3 are combined to be supported on the support leg 4 which is arranged in a penetrating way, and as shown in figure 5, after the water is injected from a plurality of spaces 21 in the lower buoyancy tank 2, the support leg 4 which is arranged in each upright post 3 is pressed downwards (the support leg can be seen to be sunk to the seabed B in the figure) to be more stable because the overall increased weight is more larger than the buoyancy; if the support legs 4 have different sinking degrees due to different geological hardnesses of the seabed, and the upper deck 1 is inclined, fine adjustment of the horizontal posture of the upper deck 1 is performed by the leveling mechanisms 5, wherein the leveling mechanisms 5 can drive the upper deck 1 to move upwards on the supported support legs 4, in this case, as shown in fig. 6, in the present embodiment, a plurality of lower positioning cylinders 52 respectively extend lower positioning rods 521 into positioning holes 42 of the supported support legs 4, the upper positioning rods 511 of the upper positioning cylinders 51 are moved out of the positioning holes 42, as shown in fig. 7, a plurality of pushing cylinders 54 drive the upper base 31 to move upwards relative to the lower base 53, as shown in fig. 8, and after the upper deck 1 is positioned, the upper positioning rods 511 of the upper positioning cylinders 51 are extended into the positioning holes 42 to be positioned; on the contrary, the plurality of lower positioning cylinders 52 still extend from the lower positioning rods 521 to the positioning holes 42 of the supporting legs 4, at this time, the upper positioning rods 511 of the upper positioning cylinders 51 are also moved out of the positioning holes 42, and the plurality of pushing cylinders 54 drive the upper base 31 to approach the lower base 53 to drive the upper deck 1 to move downwards, and after the upper deck 1 is positioned, the upper positioning rods 511 of the upper positioning cylinders 51 extend into the positioning holes 42 to be positioned. The positioning of the upper deck 1 is performed by the above-mentioned upward or downward movement until the upper deck 1 is horizontal, and the offshore operation can be performed after the upper deck is horizontal.
As is apparent from the above description, the present invention is advantageous in that, by coupling the upper deck 1 and the lower buoyancy tank 2 by the column 3, and inserting the leg 4 into the column 3, the leg 4 can be used to inject seawater to sink to touch the seabed B, and the leveling mechanism 5 provided in the column 3 can be coupled to the leg 4, and then the gravity center of the lower buoyancy tank 2 can be moved down toward the sea surface a after injecting water, so that the leg 4 is stably supported on the seabed B, and then the upper deck 1 is adjusted to move up or down to the horizontal level, and when the seawater is injected by the leg 4 to sink to be supported on the seabed B, the upper deck 1 can be maintained above the sea surface because the buoyancy of the lower buoyancy tank 2 is sufficient to support the entire weight including the upper deck 1 and the lower buoyancy tank 2, and when the entire weight and the buoyancy of the lower buoyancy tank 2 are balanced, the leveling mechanism 5 can be assisted by the buoyancy of the lower buoyancy tank 2 to easily raise or lower the buoyant upper deck 1 at the leg 4, the fine adjustment of the horizontal posture of the upper deck 1 is facilitated, the effect of stably positioning the platform can be further achieved, and the sinking of the lower floating box 2 and the support legs 4 is caused by seawater injection instead of a special lifting driving mechanism, so that the cost can be saved and the platform is economical.
The foregoing description of the embodiments is provided to illustrate and not to limit the invention, and changes in values or substitutions of equivalent elements are intended to fall within the scope of the invention.
From the above detailed description, it will be apparent to those skilled in the art that the present invention can be practiced without these specific details.
Claims (4)
1. A semi-submersible supporting platform for offshore operation after running to a fixed point on the sea surface is characterized by comprising an upper deck and a lower floating box, wherein the upper deck is connected with the lower floating box through a plurality of stand columns, each stand column is longitudinally penetrated with a support leg, each support leg is provided with a plurality of positioning holes, the lower floating box is internally provided with a plurality of spaces, the spaces can be used for supplying water to sink after injection or float after drainage, each support leg is provided with a cabin with a closed bottom, the cabin can be used for supplying water to sink after injection or float after drainage, each stand column is internally provided with a leveling mechanism, each leveling mechanism is provided with an upper seat and a lower seat, the upper seat is provided with a plurality of upper positioning cylinders, the lower seat is provided with a plurality of lower positioning cylinders, the upper seat is connected with the lower seat through a plurality of pushing cylinders, each upper positioning cylinder is provided with an upper positioning rod capable of transversely stretching, each lower positioning cylinder is provided with a lower positioning rod capable of transversely stretching, when each support leg is sunk to touch the seabed, the upper positioning rod of the upper positioning cylinder extends into the positioning hole of the support leg, or the lower positioning rod of the lower positioning cylinder extends into the positioning hole of the support leg, and the pushing cylinder drives the lower seat to move close to or away from the upper seat so as to drive the upper deck to move up or down.
2. The semi-submersible support platform of claim 1 wherein each column has a plurality of sides and a wave-dissipating channel is provided in each column, the wave-dissipating channel having a through hole on each side and the through holes being in communication with each other in the column by a conduit, such that when waves strike the column, seawater can enter through one of the through holes and exit through the conduit through the remaining through holes to eliminate the force of the waves striking the column.
3. A method for positioning a semi-submersible supporting platform, wherein the semi-submersible supporting platform comprises an upper deck and a lower floating box, the upper deck and the lower floating box are connected by a plurality of columns, each column is longitudinally penetrated with a support leg, the lower floating box is internally provided with a plurality of spaces, the plurality of spaces can be supplied with water and then sink or float after being drained, each support leg is provided with a cabin with a closed bottom and can be supplied with water and then sink or float after being drained, a leveling mechanism is arranged in each column, the semi-submersible supporting platform is characterized in that after the sea surface runs to a fixed point, the cabin of each support leg is supplied with water and then sinks to touch the seabed after being filled with water, the leveling mechanism in each column is combined with the support leg, after the water is supplied to be filled by the plurality of spaces in the lower floating box, each support leg sinks again, and each leveling mechanism can respectively drive the upper deck to move upwards or downwards on the support leg, until the upper deck is horizontal.
4. A method of positioning a semi-submersible support platform according to claim 1, after the sea surface is driven to a fixed point, the water is supplied and injected from the cabins of all the support legs and then sinks to touch the seabed, the support legs are combined by the leveling mechanisms in all the upright columns, and then the water is supplied and injected from a plurality of spaces in the lower floating box, the supporting feet sink again, and the leveling mechanisms can respectively drive the upper deck to move upwards or downwards on the supporting feet until the upper deck is horizontal, the upward movement is that the plurality of lower positioning cylinders respectively extend the lower positioning rods into the positioning holes of the supporting legs, and the upper positioning rods of the plurality of upper positioning cylinders move out of the positioning holes, and the upper seat is driven to move away from the lower seat by the plurality of pushing cylinders so as to drive the upper deck to move upwards, after the upper deck is positioned, the upper positioning rods of the plurality of upper positioning cylinders extend into the positioning holes for positioning; the downward movement is realized by that the plurality of lower positioning cylinders respectively extend lower positioning rods into positioning holes of the support legs, the upper positioning rods of the plurality of upper positioning cylinders move out of the positioning holes, the plurality of pushing cylinders drive the upper seat to approach the lower seat so as to drive the upper deck to move downward, and after the upper deck is positioned, the upper positioning rods of the plurality of upper positioning cylinders extend into the positioning holes to be positioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710704660.1A CN109403295B (en) | 2017-08-17 | 2017-08-17 | Semi-submersible type supporting platform and positioning method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710704660.1A CN109403295B (en) | 2017-08-17 | 2017-08-17 | Semi-submersible type supporting platform and positioning method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109403295A CN109403295A (en) | 2019-03-01 |
| CN109403295B true CN109403295B (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710704660.1A Expired - Fee Related CN109403295B (en) | 2017-08-17 | 2017-08-17 | Semi-submersible type supporting platform and positioning method thereof |
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| Country | Link |
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| CN (1) | CN109403295B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3977346A (en) * | 1973-07-05 | 1976-08-31 | A/S Akers Mek. Verksted | Deck structure and method for building same |
| US20060086305A1 (en) * | 2003-10-07 | 2006-04-27 | Deepwater Technology Group Pte Ltd. | Extended semi-submersible vessel (ESEMI) |
| CN201649058U (en) * | 2010-05-31 | 2010-11-24 | 抚州市临川白勇海洋工程有限公司 | Self-lifting platform pile leg locking device |
| CN102080371A (en) * | 2009-11-27 | 2011-06-01 | 三一电气有限责任公司 | Support leg and mobile offshore work platform |
| CN104250968A (en) * | 2013-06-26 | 2014-12-31 | 上海利策海洋工程技术有限公司 | Self-installation suction pile type movable platform structure |
| CN104401450A (en) * | 2014-11-13 | 2015-03-11 | 广州打捞局 | Hull of pile driving barge |
| CN106012973A (en) * | 2016-07-15 | 2016-10-12 | 海南海博海洋产业发展有限公司 | Sand-fixing and wave-breaking hydraulic-filled island-reef revetment made of basalt fiber |
-
2017
- 2017-08-17 CN CN201710704660.1A patent/CN109403295B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3977346A (en) * | 1973-07-05 | 1976-08-31 | A/S Akers Mek. Verksted | Deck structure and method for building same |
| US20060086305A1 (en) * | 2003-10-07 | 2006-04-27 | Deepwater Technology Group Pte Ltd. | Extended semi-submersible vessel (ESEMI) |
| CN102080371A (en) * | 2009-11-27 | 2011-06-01 | 三一电气有限责任公司 | Support leg and mobile offshore work platform |
| CN201649058U (en) * | 2010-05-31 | 2010-11-24 | 抚州市临川白勇海洋工程有限公司 | Self-lifting platform pile leg locking device |
| CN104250968A (en) * | 2013-06-26 | 2014-12-31 | 上海利策海洋工程技术有限公司 | Self-installation suction pile type movable platform structure |
| CN104401450A (en) * | 2014-11-13 | 2015-03-11 | 广州打捞局 | Hull of pile driving barge |
| CN106012973A (en) * | 2016-07-15 | 2016-10-12 | 海南海博海洋产业发展有限公司 | Sand-fixing and wave-breaking hydraulic-filled island-reef revetment made of basalt fiber |
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| Publication number | Publication date |
|---|---|
| CN109403295A (en) | 2019-03-01 |
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